Package org.springframework.integration.aggregator

Class ExpressionEvaluatingMessageGroupProcessor

java.lang.Object

org.springframework.integration.aggregator.AbstractAggregatingMessageGroupProcessor

org.springframework.integration.aggregator.ExpressionEvaluatingMessageGroupProcessor

All Implemented Interfaces:

Aware, BeanFactoryAware, MessageGroupProcessor

public class ExpressionEvaluatingMessageGroupProcessor
extends AbstractAggregatingMessageGroupProcessor

A MessageGroupProcessor implementation that evaluates a SpEL expression. The SpEL context root is the list of all Messages in the group. The evaluation result can be any Object and is send as new Message payload to the output channel.

Author:

Alex Peters, Dave Syer, Gary Russell

Field Summary

Fields inherited from class org.springframework.integration.aggregator.AbstractAggregatingMessageGroupProcessor

logger

Constructor Summary

Constructors

Constructor	Description
ExpressionEvaluatingMessageGroupProcessor(String expression)

Method Summary

Modifier and Type	Method	Description
protected Object	aggregatePayloads(MessageGroup group, Map<String,Object> headers)	Evaluate the expression provided on the messages (a collection) in the group, and delegate to the MessagingTemplate to send downstream.
void	setBeanFactory(BeanFactory beanFactory)
void	setConversionService(ConversionService conversionService)
void	setExpectedType(Class<?> expectedType)

Methods inherited from class org.springframework.integration.aggregator.AbstractAggregatingMessageGroupProcessor

aggregateHeaders, getHeadersFunction, getMessageBuilderFactory, processMessageGroup, setHeadersFunction

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ExpressionEvaluatingMessageGroupProcessor

public ExpressionEvaluatingMessageGroupProcessor(String expression)

Method Details

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)

Specified by:

setBeanFactory in interface BeanFactoryAware

Overrides:

setBeanFactory in class AbstractAggregatingMessageGroupProcessor

setConversionService

public void setConversionService(ConversionService conversionService)

setExpectedType

public void setExpectedType(Class<?> expectedType)

aggregatePayloads

protected Object aggregatePayloads(MessageGroup group,
 Map<String,Object> headers)

Evaluate the expression provided on the messages (a collection) in the group, and delegate to the MessagingTemplate to send downstream.

Specified by:

aggregatePayloads in class AbstractAggregatingMessageGroupProcessor